Issue

• Not able to mount samba cifs share with flag sec=ntlmv2 or sec=ntlmv2i parameter.

mount.cifs //192.168.2.2/data /mnt -o user=tuser,password=password,sec=ntlmv2i

• Following error is observed in /var/log/messages logs.

Jun 27 12:22:42 samba-client kernel: CIFS VFS: cifs_mount failed w/return code = -22
Jun 27 12:22:42 samba-client kernel: CIFS VFS: cifs_mount failed w/return code = -22
Jun 27 12:22:55 samba-client kernel: Status code returned 0xc000000d NT_STATUS_INVALID_PARAMETER
Jun 27 12:22:55 samba-client kernel: Status code returned 0xc000000d NT_STATUS_INVALID_PARAMETER
Jun 27 12:22:55 samba-client kernel: CIFS VFS: Send error in SessSetup = -22
Jun 27 12:22:55 samba-client kernel: CIFS VFS: Send error in SessSetup = -22
Jun 27 12:22:55 samba-client kernel: CIFS VFS: cifs_mount failed w/return code = -22
Jun 27 12:22:55 samba-client kernel: CIFS VFS: cifs_mount failed w/return code = -22

• Following error is observed in /var/log/messages logs.

 Requested protocol [NT LM 0.12]
[2016/06/27 12:34:57.521367,  3] smbd/negprot.c:598(reply_negprot)
  Requested protocol [POSIX 2]
[2016/06/27 12:34:57.521664,  3] smbd/negprot.c:401(reply_nt1)
  not using SPNEGO
[2016/06/27 12:34:57.521754,  3] smbd/negprot.c:704(reply_negprot)
  Selected protocol NT LM 0.12
[2016/06/27 12:34:57.522460,  3] smbd/process.c:1609(process_smb)
  Transaction 1 of length 286 (0 toread)
[2016/06/27 12:34:57.522567,  3] smbd/process.c:1414(switch_message)
  switch message SMBsesssetupX (pid 8827) conn 0x0
[2016/06/27 12:34:57.522670,  3] smbd/sesssetup.c:1347(reply_sesssetup_and_X)
  wct=13 flg2=0xd005
[2016/06/27 12:34:57.522772,  3] smbd/sesssetup.c:1550(reply_sesssetup_and_X)
  Domain=[EXAMPLE]  NativeOS=[Linux version 2.6.18-410.el5] NativeLanMan=[CIFS VFS Client for Linux] PrimaryDomain=[null]
[2016/06/27 12:34:57.522861,  3] smbd/sesssetup.c:1566(reply_sesssetup_and_X)
  sesssetupX:name=[EXAMPLE]\[tuser]@[10.254.62.145]
[2016/06/27 12:34:57.523009,  2] auth/auth_util.c:380(make_user_info_for_reply_enc)
  Rejecting raw NTLMv2 authentication with user [EXAMPLE\tuser]
[2016/06/27 12:34:57.523110,  3] smbd/error.c:81(error_packet_set)
  error packet at smbd/sesssetup.c(1678) cmd=115 (SMBsesssetupX) NT_STATUS_INVALID_PARAMETER
[2016/06/27 12:34:57.649694,  3] smbd/server_exit.c:181(exit_server_common)
  Server exit (failed to receive smb request)